Underwater watch



FIG. 1 is a front view of an underwater watch showing my new design;

FIG. 2 is a side view taken from the left in FIG. 1;

FIG. 3 is a side view taken from the right in FIG. 1;

FIG. 4 is a rear view;

FIG. 5 is a view taken from the top in FIG. 1; and,

FIG. 6 is a view taken from the bottom in FIG. 1.

The ornamental design for an underwater watch, as shown.